Three Luxon Shrines generate in the Ancient Cavern. Two generate in the main room, and one generates within Horon's chamber.
The Luxon Shrine has two functions based on its position within the Ancient Cavern. If used outside of the Ancient Cavern, the Luxon Shrine does nothing.
When interacted with, the Luxon Shrine in Horon's chamber will teleport the player back to the main room. This will also remove 20 Luxon tribute points from the player.